US Patent No: 6,268,979
Number of patents in Portfolio can not be more than 2000
Magnetic record medium having a sputter formed thin film texture with second projections of a height lower than first projections
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Jul 31, 2001
Issued date -
Mar 3, 1999
filing date -
09/261,827
serial no -
In Force
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Abstract
A magnetic recording medium includes a substrate, a data region and a CSS region on a surface of the substrate. Information is recorded in the data region, and a magnetic head is held stationary in the CSS region. A thin film texture is fabricated in the data region by sputtering, and a laser texture is fabricated in the CSS region by laser irradiation. The laser texture includes a plurality of first projections. The thin film texture includes a plurality of second projections. The second projections are lower in height than the first projections.
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First Claim
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International Classification(s)
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Cited Art
| Patent Info | (Count) | # Cites | Year |
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| 5,976,714 Magnetic recording medium and method of producing the same | 20 | 1996 | |
| 5,928,759 Magnetic recording medium, method of producing the same, and recording and reading-out method | 28 | 1997 | |
| 6,057,984 Method for data writing/read-out using a contact start and stop system | 13 | 1999 | |
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| 6,025,310 Organic compounds suited to lubricating films on magnetic recording media | 6 | 1998 | |
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| 6,020,045 Textured magnetic recording medium having a transition zone | 21 | 1996 | |
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| 5,978,189 Substrate for a magnetic recording medium having laser beam absorption characteristic and a magnetic recording medium using the substrate | 7 | 1997 | |
Patent Citation Ranking
Maintenance Fees
| Fee | Large entity fee | small entity fee | micro entity fee | due date |
|---|---|---|---|---|
| 11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | Jan 31, 2013 |
| Fee | Large entity fee | small entity fee | micro entity fee |
|---|---|---|---|
| Surcharge - 11.5 year - Late payment within 6 months | $160.00 | $80.00 | $40.00 |
| Surcharge after expiration - Late payment is unavoidable | $700.00 | $350.00 | $175.00 |
| Surcharge after expiration - Late payment is unintentional | $1,640.00 | $820.00 | $410.00 |